In your kitchen you start a three-minute egg timer and a 60-minute hourglass simultaneously and then leave. You return a short while later to find the hourglass fully discharged but not the egg timer! Something must be wrong with at least one of the two timers.

Without a doubt, Earth is round, or nearly so. Using careful measurements from the ground and observations from space we can be certain it is essentially a sphere, with only minor bulging near the equator.

One focus of the RATE (Radioisotopes and the Age of The Earth) project was radiohalos research.¹ It was concluded that the uranium (²³⁸U) and polonium (Po) radiohalos frequently found in granitic rocks had to have formed simultaneously.² This implies that hundreds of millions of years of radioactive decay (at today's rates) had to have occurred in a matter of a